375 



Occurrence. Some few specimens of this form, all of the female sex, 

 were found in a sample kindly send to me from Mr. Nordgaard, who procured 

 it in the Trold Fjord, inside the Lofoten islands. 



Add also the following genus and species : 



den. Idomenella, Scott, 



Generic Characters. Body somewhat resembling in shape that in Dac- 

 tylopusia, but more depressed. Anterior antennae comparatively short and stout, 

 with the number of joints reduced, and carrying, in addition to the usual setae a 

 number of slender, densely pectinate spines. Posterior antennae and oral parts 

 on the whole built upon the same type as in Idomene. 1st pair of legs, as in 

 that genus, having the inner ramus distinctly 3-articulate, with the 1st joint 

 lamellarly dilated. Natatory legs normal. Last pair of legs, however, imperfectly 

 developed, with no distinct boundary between the distal and proximal joints. 



Remarks. This genus has recently been established by Th. Scott, to 

 include the form described by him at an earlier date as Dactylopus coronatus. 

 As indicated by the generic name proposed, it is nearest allied to the genus 

 Idomene Philippi, from which it chiefly differs in the structure of the anterior 

 antennae and of the last pair of legs. The diminutive end-syllable of the 

 name Idomenella is somewhat unappropriate, in so far as the type species is in 

 reality of considerably larger size than either of the 2 known species belonging 

 to the genus Idomene. 



Idomenella eoronata, Scott. 



(Suppl. PI. 14). 



Dactylopus coronatus, Scott, Additions to the Fauna of the Firth of Forth. Twelfth Ann. Rep. 

 of the Fishery Board for Scotland, p. 255, PI. IX, figs 1220. 



Syn: Idomene eoronata, G. 0. Sars. 



Specific Characters. Female. Body moderately robust and pronouncedly 

 depressed, tapering gradually behind. Cephalic segment rather large and pro- 

 duced in front into an obtuse rostral projection. Urosome comparatively short, 

 not attaining half the length of the anterior division, its segments coarsely 

 spinulose at the hind edge ventrally and laterally. Caudal rami scarcely longer 

 than they are broad, apical setae normal and of moderate length. Anterior an- 

 tennae comparatively short and stout, 6-articulate, gradually tapered and densely 

 setiferous, carrying besides a number of slender spines edged with long spinules 



